Double-shaft stirring drilling machine with adjustable center distance
By setting a center distance hole group on the power head bracket of the double-axis mixing drill rig and replacing the stirring cutting blades, the problem of fixing the center distance of the traditional drill rig is solved, and the construction of multiple pile spacings is achieved, reducing costs and improving efficiency.
Patent Information
- Application Number
- CN202421199209.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The center distance of the traditional two-axis mixing drill rig is fixed and cannot adapt to the construction of different pile spacings, resulting in the need to replace drill rigs of different specifications, which increases cost and maintenance complexity, and the single-axis drill rig is inefficient.
By setting a center distance hole group on the bottom plate of the power head bracket, the center distance of the power head is adjusted, and combined with the replacement of stirring and cutting blades of different lengths, the construction of multiple pile spacings is achieved, simplifying the structure and reducing costs.
It realizes flexible adjustment of the center distance, reduces the specifications and types of mixing drilling rigs, reduces costs, improves construction efficiency, and makes the soil stirring more evenly.
Smart Images
Figure CN222296136U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engineering machinery, in particular to a double-shaft mixing drill with adjustable center distance. Background Art
[0002] Cement mixing pile is a method used to reinforce saturated soft clay foundation. It uses cement as a curing agent. A special mixing drill is used to forcefully mix the soft soil and curing agent deep in the foundation. A series of physical and chemical reactions between the curing agent and the soft soil are used to harden the soft soil into a high-quality foundation with integrity, water stability and a certain strength. The reinforcement depth is usually more than 5m, the dry reinforcement depth does not exceed 15m, and the wet reinforcement depth does not exceed 20m. The cement slurry pressed into the soft soil is forcibly mixed with the surrounding soft soil by the rotating mixing blade to form a mud reinforcement body.
[0003] When traditional twin-shaft mixing drills are manufactured, the center distance between the two mixing piles is fixed, that is, the positions of the power head, drill rod assembly and drill bit assembly are fixed, so the construction spacing between the two mixing piles is a fixed value, which cannot be applied to the construction of various pile spacings. If piles with different pile spacings are to be constructed, it is necessary to replace the twin-shaft mixing drill with a different center distance, which increases the cost. If a single-shaft mixing drill is used, the efficiency is too low.
[0004] Chinese invention patent CN202310062255X discloses a two-axis bidirectional mixing drilling rig with adjustable spacing and a construction method, including a slide, a drill rod assembly, a drill bit assembly and a power head, two identical power heads are suspended at the lower end of the slide, and the power head includes a power source, a housing, a transmission gear set, a pitch-changing mechanism and an output shaft assembly; the pitch-changing mechanism can change the distance between the two power heads, and the pitch-changing mechanism is provided with a magnetostrictive displacement sensor, which can measure the displacement change of the piston rod relative to the oil cylinder in real time, and the center distance of the output shaft assemblies of the two power heads after the pitch change can be locked unchanged; the output shaft assembly extending from the lower end of the housing drives the inner rod and the outer rod of the drill rod assembly to rotate forward and reverse respectively, and the inner rod and the outer rod then drive the drill bit of the drill bit assembly to rotate and stir in both directions respectively; by using the two-axis bidirectional mixing drilling rig with adjustable spacing and the construction method, the spacing between the two-way mixing piles can be flexibly adjusted, and the construction efficiency of high-quality mixing piles can be greatly improved. However, the pitch-changing mechanism in the above patent has a complex structure, high manufacturing cost, increased maintenance cost, and increased energy consumption.
[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention
[0006] The purpose of the utility model is to address the deficiencies in the prior art and thus provide a double-shaft mixing drill with adjustable center distance. The utility model has simple and quick adjustment of the center distance and can replace mixing drills of different specifications and types, thereby reducing the types of specifications of mixing drills used, saving costs for construction units, improving work efficiency, having a simple structure and low manufacturing cost.
[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a dual-axis mixing drill rig with adjustable center distance, including a power head bracket and two power heads, the two power heads are installed on the power head bracket with a left and right interval, the lower end of the output shaft of each power head is connected to the drill bit through a drill rod assembly, and a center distance hole group for adjusting the center distance of the two power heads and installing the two power heads is provided on the bottom plate of the power head bracket, and the center distance hole group is arranged along the left and right width direction of the power head bracket.
[0008] The center distance hole group includes a first hole group and a second hole group that correspond to each other and are arranged side by side; the first hole group includes a plurality of first avoidance holes that are arranged at intervals on the front side of the bottom plate of the power head bracket, and a plurality of first bolt holes that are arranged at intervals and are bolted to the front side of the power head base are provided on the bottom plate of the power head bracket at the front edge of each first avoidance hole, and the lower end of the output shaft of the power head passes through the corresponding first avoidance hole and is transmission-connected to the upper end of the corresponding drill rod assembly;
[0009] The second hole group includes a plurality of second avoidance holes arranged at intervals on the left and right sides of the rear side of the base plate of the power head bracket, each second avoidance hole corresponds to each first avoidance hole on the front side one by one, and a plurality of second bolt holes arranged at intervals and connected to the rear side of the power head base by bolt assembly are provided on the base plate of the power head at the rear edge of each second avoidance hole, and the lower end of the input shaft of the power head passes through the corresponding second avoidance hole.
[0010] Both drill bits are fixedly connected with a plurality of stirring and cutting blades at equal intervals along the axial direction. The stirring and cutting blades on the left drill bit and the stirring and cutting blades on the right drill bit are staggered in the upper and lower directions and the adjacent sides of the boreholes formed on the ground overlap.
[0011] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model sets a center distance hole group on the bottom plate of the power head bracket, and then can change the installation position of the two power heads according to the construction requirements, thereby changing the center distance of the two boreholes, which is suitable for the construction of various pile spacings. At the same time, by replacing the drill bit with mixing and cutting blades of different lengths, the length of the mixing and cutting blades is changed to ensure that the mixing and cutting blades on the two drill bits are staggered and arranged at intervals up and down and the adjacent sides of the boreholes formed on the ground overlap, so that the soil being mixed produces a mutual shearing effect, making the mixed soil more uniform. The utility model is simple and quick to adjust the center distance, can replace mixing drills of different specifications and types, reduce the types of specifications of mixing drills, save costs for construction units, improve work efficiency, simple structure, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a right view of the utility model.
[0013] Figure 2 It is a front view of the utility model.
[0014] Figure 3 yes Figure 1 A partial enlarged schematic diagram of point I in the middle.
[0015] Figure 4 yes Figure 3 AA section view.
[0016] Figure 5 yes Figure 2 A partial enlarged schematic diagram of point II in the middle.
[0017] In the figure: 1. power head; 2. power head bracket; 3. drill rod assembly; 4. drill bit; 5. first avoidance hole; 6. first bolt hole; 7. second avoidance hole; 8. second bolt hole; 9. stirring and cutting blade. DETAILED DESCRIPTION
[0018] The technical solution of the utility model is further described in detail below through specific implementation methods.
[0019] In order to better illustrate the structural improvements, Figure 1 and Figure 2 The upper part of the apparatus retains the assembly structure of the power head 1 and the power head bracket 2 before the improvement. Figure 1 and Figure 2 The lower part in the figure is the structure of the improved power head bracket 2. In order to more intuitively express the structure of the improved power head bracket 2, the power head 1 installed thereon is omitted.
[0020] like Figure 1-5As shown, a twin-shaft mixing drill with adjustable center distance comprises a power head bracket 2 and two power heads 1. The two power heads 1 are installed on the power head bracket 2 at intervals on the left and right. The lower end of the output shaft of each power head 1 is connected to a drill bit 4 through a drill rod assembly 3. A center distance hole group for adjusting the center distance of the two power heads 1 and installing the two power heads 1 is provided on the bottom plate of the power head bracket 2. The center distance hole group is arranged along the left and right width direction of the power head bracket 2.
[0021] The center distance hole group includes a first hole group and a second hole group that correspond to each other and are arranged side by side; the first hole group includes four first avoidance holes 5 that are arranged at intervals on the front side of the bottom plate of the power head bracket 2, and a plurality of first bolt holes 6 that are arranged at intervals and are bolted to the front side of the base of the power head 1 are opened on the bottom plate of the power head bracket 2 at the front edge of each first avoidance hole 5, and the lower end of the output shaft of the power head 1 passes through the corresponding first avoidance hole 5 and is transmission-connected to the upper end of the corresponding drill rod assembly 3;
[0022] The second hole group includes four second avoidance holes 7 arranged at intervals on the rear side of the bottom plate of the power head bracket 2, each second avoidance hole 7 corresponds to each first avoidance hole 5 on the front side one by one, and a plurality of second bolt holes 8 arranged at intervals and connected to the rear side of the base of the power head 1 by bolt assembly are opened on the bottom plate of the power head bracket 2 at the rear edge of each second avoidance hole 7, and the lower end of the input shaft of the power head 1 passes through the corresponding second avoidance hole 7;
[0023] The leftmost and rightmost first avoidance holes 5 and the leftmost and rightmost second avoidance holes 7 are both runway-shaped long holes, the two first avoidance holes 5 in the middle are runway-shaped short holes, and the two second avoidance holes 7 in the middle are round holes.
[0024] In other embodiments, the first avoidance hole 5 and the second avoidance hole 7 can also be set as a runway-shaped long hole, or can be set as two or three runway-shaped long holes, or can be set as multiple circular holes, so as to realize the installation of the power head 1 at different left and right positions on the bottom plate of the power head bracket 2, thereby achieving the purpose of adjusting the center distance between the two drill bits 4.
[0025] Both drill bits 4 are fixedly connected with a plurality of stirring and cutting blades 9 at equal intervals along the axial direction. The stirring and cutting blades 9 on the left drill bit 4 and the stirring and cutting blades 9 on the right drill bit 4 are staggered in the upper and lower directions and the adjacent sides of the boreholes formed on the ground overlap.
[0026] When this embodiment is used, the installation positions of the two power heads 1 can be changed according to construction requirements. Specifically, the left and right positions of the two power heads 1 on the power head bracket 2 are adjusted so that the lower ends of the output shafts of the two power heads 1 pass through the corresponding different first avoidance holes 5, and the corresponding lower ends of the input shafts of the two power heads 1 pass through the corresponding different second avoidance holes 7. When the construction requirements are met, the front sides of the bases of the two power heads 1 are respectively assembled and connected with the part of the first bolt holes 6 on the front sides of the corresponding first avoidance holes 5 by bolts. Similarly, the rear sides of the bases of the two power heads 1 are respectively assembled and connected with the part of the second bolt holes 8 on the rear sides of the corresponding second avoidance holes 7 by bolts. Then, the lower ends of the output shafts of the two power heads 1 are transmission-connected with the upper ends of the two drill rod assemblies 3, thereby changing the center distance of the two boreholes to meet the pile spacing required by the construction. At the same time, the drill bits 4 with stirring and cutting blades 9 of different lengths are replaced, and the length of the stirring and cutting blades 9 is changed to ensure that the stirring and cutting blades 9 on the two drill bits 4 are staggered and arranged at intervals up and down and the adjacent sides of the boreholes formed on the ground overlap, so that the stirred soil produces a mutual shearing effect, making the stirred soil more uniform. In this way, the dual-shaft mixing drill with adjustable center distance can replace mixing drills of different specifications and types by adjusting the center distance, reducing the types of mixing drills used, saving costs for construction units, improving work efficiency, and having a simple structure and low manufacturing cost.
[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.
Claims
1. A double-shaft mixing drill with adjustable center distance, comprising a power head bracket and two power heads, the two power heads are installed on the power head bracket at intervals, the lower end of the output shaft of each power head is connected to a drill bit through a drill rod assembly, and is characterized in that: A center distance hole group for adjusting the center distance between the two power heads and installing the two power heads is provided on the bottom plate of the power head bracket, and the center distance hole group is arranged along the left and right width direction of the power head bracket.
2. The center distance adjustable double-shaft mixing drill according to claim 1, characterized in that: The center distance hole group includes a first hole group and a second hole group that correspond to each other and are arranged side by side; the first hole group includes a plurality of first avoidance holes that are arranged at intervals on the front side of the bottom plate of the power head bracket, and a plurality of first bolt holes that are arranged at intervals and are bolted to the front side of the power head base are provided on the bottom plate of the power head bracket at the front edge of each first avoidance hole, and the lower end of the output shaft of the power head passes through the corresponding first avoidance hole and is transmission-connected to the upper end of the corresponding drill rod assembly; The second hole group includes a plurality of second avoidance holes arranged at intervals on the left and right sides of the rear side of the base plate of the power head bracket, each second avoidance hole corresponds to each first avoidance hole on the front side one by one, and a plurality of second bolt holes arranged at intervals and connected to the rear side of the power head base by bolt assembly are provided on the base plate of the power head at the rear edge of each second avoidance hole, and the lower end of the input shaft of the power head passes through the corresponding second avoidance hole.
3. The center distance adjustable double-shaft mixing drill according to claim 1, characterized in that: Both drill bits are fixedly connected with a plurality of stirring and cutting blades at equal intervals along the axial direction. The stirring and cutting blades on the left drill bit and the stirring and cutting blades on the right drill bit are staggered in the upper and lower directions and the adjacent sides of the boreholes formed on the ground overlap.